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From: Manikanta Maddireddy <mmaddireddy@nvidia.com>
To: Thierry Reding <thierry.reding@gmail.com>
Cc: <bhelgaas@google.com>, <robh+dt@kernel.org>,
	<mark.rutland@arm.com>, <jonathanh@nvidia.com>,
	<lorenzo.pieralisi@arm.com>, <vidyas@nvidia.com>,
	<linux-tegra@vger.kernel.org>, <linux-pci@vger.kernel.org>,
	<devicetree@vger.kernel.org>
Subject: Re: [PATCH 13/30] PCI: tegra: Update flow control threshold in Tegra210
Date: Tue, 23 Apr 2019 14:57:31 +0530
Message-ID: <cb1c70a9-39e7-b8f1-d47b-b0e374a016f4@nvidia.com> (raw)
In-Reply-To: <e55e7850-a960-4b36-7b62-f7ed85d3b17f@nvidia.com>



On 15-Apr-19 8:35 PM, Manikanta Maddireddy wrote:
>
> On 15-Apr-19 5:17 PM, Thierry Reding wrote:
>> On Thu, Apr 11, 2019 at 10:33:38PM +0530, Manikanta Maddireddy wrote:
>>> Recommended update FC threshold in Tegra210 is 0x60 for best performance
>>> of x1 link. Setting this to 0x60 provides the best balance between number
>>> of UpdateFC and read data sent over the link.
>>>
>>> Signed-off-by: Manikanta Maddireddy <mmaddireddy@nvidia.com>
>>> ---
>>>  drivers/pci/controller/pci-tegra.c | 15 +++++++++++++++
>>>  1 file changed, 15 insertions(+)
>> Looks to me like part of this patch ended up in 12/30?
>>
>> Thierry
> Ok, I will squash 12/30 & 13/30 and clearly mentioned what it means for T124 and T210
> in commit message.

12/30 and 13/30 are fixing two independent issues, so I couldn't merge these
two patches. However I am providing more details in commit log in V2, please
take a look at V2 and let me know if you have different opinion.

Manikanta

>>> diff --git a/drivers/pci/controller/pci-tegra.c b/drivers/pci/controller/pci-tegra.c
>>> index b74408eeb367..7dc728cc5f51 100644
>>> --- a/drivers/pci/controller/pci-tegra.c
>>> +++ b/drivers/pci/controller/pci-tegra.c
>>> @@ -319,6 +319,7 @@ struct tegra_pcie_soc {
>>>  	bool update_clamp_threshold;
>>>  	bool program_deskew_time;
>>>  	bool raw_violation_fixup;
>>> +	bool update_fc_threshold;
>>>  	struct {
>>>  		struct {
>>>  			u32 rp_ectl_2_r1;
>>> @@ -662,6 +663,13 @@ static void tegra_pcie_apply_sw_fixup(struct tegra_pcie_port *port)
>>>  		value |= soc->update_fc_val;
>>>  		writel(value, port->base + RP_VEND_XP);
>>>  	}
>>> +
>>> +	if (soc->update_fc_threshold) {
>>> +		value = readl(port->base + RP_VEND_XP);
>>> +		value &= ~RP_VEND_XP_UPDATE_FC_THRESHOLD_MASK;
>>> +		value |= soc->update_fc_val;
>>> +		writel(value, port->base + RP_VEND_XP);
>>> +	}
>>>  }
>>>  
>>>  static void tegra_pcie_port_enable(struct tegra_pcie_port *port)
>>> @@ -2409,6 +2417,7 @@ static const struct tegra_pcie_soc tegra20_pcie = {
>>>  	.update_clamp_threshold = false,
>>>  	.program_deskew_time = false,
>>>  	.raw_violation_fixup = false,
>>> +	.update_fc_threshold = false,
>>>  	.ectl.enable = false,
>>>  };
>>>  
>>> @@ -2436,6 +2445,7 @@ static const struct tegra_pcie_soc tegra30_pcie = {
>>>  	.update_clamp_threshold = false,
>>>  	.program_deskew_time = false,
>>>  	.raw_violation_fixup = false,
>>> +	.update_fc_threshold = false,
>>>  	.ectl.enable = false,
>>>  };
>>>  
>>> @@ -2458,6 +2468,7 @@ static const struct tegra_pcie_soc tegra124_pcie = {
>>>  	.update_clamp_threshold = true,
>>>  	.program_deskew_time = false,
>>>  	.raw_violation_fixup = true,
>>> +	.update_fc_threshold = false,
>>>  	.ectl.enable = false,
>>>  };
>>>  
>>> @@ -2468,6 +2479,8 @@ static const struct tegra_pcie_soc tegra210_pcie = {
>>>  	.pads_pll_ctl = PADS_PLL_CTL_TEGRA30,
>>>  	.tx_ref_sel = PADS_PLL_CTL_TXCLKREF_BUF_EN,
>>>  	.pads_refclk_cfg0 = 0x90b890b8,
>>> +	/* FC threshold is bit[25:18] */
>>> +	.update_fc_val = 0x01800000,
>>>  	.has_pex_clkreq_en = true,
>>>  	.has_pex_bias_ctrl = true,
>>>  	.has_intr_prsnt_sense = true,
>>> @@ -2478,6 +2491,7 @@ static const struct tegra_pcie_soc tegra210_pcie = {
>>>  	.update_clamp_threshold = true,
>>>  	.program_deskew_time = true,
>>>  	.raw_violation_fixup = false,
>>> +	.update_fc_threshold = true,
>>>  	.ectl.regs.rp_ectl_2_r1 = 0x0000000f,
>>>  	.ectl.regs.rp_ectl_4_r1 = 0x00000067,
>>>  	.ectl.regs.rp_ectl_5_r1 = 0x55010000,
>>> @@ -2513,6 +2527,7 @@ static const struct tegra_pcie_soc tegra186_pcie = {
>>>  	.update_clamp_threshold = false,
>>>  	.program_deskew_time = false,
>>>  	.raw_violation_fixup = false,
>>> +	.update_fc_threshold = false,
>>>  	.ectl.enable = false,
>>>  };
>>>  
>>> -- 
>>> 2.17.1
>>>


  reply index

Thread overview: 106+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 17:03 [PATCH 00/30] Enable Tegra PCIe root port features Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 01/30] soc/tegra: pmc: Export tegra_powergate_power_on() Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 02/30] PCI: tegra: Fix PCIe host power up sequence Manikanta Maddireddy
2019-04-15 11:01   ` Thierry Reding
2019-04-15 14:11     ` Manikanta Maddireddy
2019-04-15 14:30       ` Thierry Reding
2019-04-15 18:14         ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 03/30] PCI: tegra: Move REFCLK pad settings out of phy_power_on() Manikanta Maddireddy
2019-04-15 11:06   ` Thierry Reding
2019-04-15 14:20     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 04/30] PCI: tegra: Add PCIe Gen2 link speed support Manikanta Maddireddy
2019-04-15 11:21   ` Thierry Reding
2019-04-15 14:47     ` Manikanta Maddireddy
2019-04-15 15:36       ` Thierry Reding
2019-04-15 15:53         ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 05/30] PCI: tegra: Advertise PCIe Advanced Error Reporting (AER) capability Manikanta Maddireddy
2019-04-15 11:23   ` Thierry Reding
2019-04-15 14:49     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 06/30] PCI: tegra: Program UPHY electrical settings for Tegra210 Manikanta Maddireddy
2019-04-15 11:29   ` Thierry Reding
2019-04-15 14:55     ` Manikanta Maddireddy
2019-04-15 15:38       ` Thierry Reding
2019-04-11 17:03 ` [PATCH 07/30] PCI: tegra: Enable opportunistic update FC and ACK Manikanta Maddireddy
2019-04-15 11:30   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 08/30] PCI: tegra: Disable AFI dynamic clock gating Manikanta Maddireddy
2019-04-15 11:32   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 09/30] PCI: tegra: Process pending DLL transactions before entering L1 or L2 Manikanta Maddireddy
2019-04-15 11:33   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 10/30] PCI: tegra: Enable PCIe xclk clock clamping Manikanta Maddireddy
2019-04-15 11:37   ` Thierry Reding
2019-04-15 14:58     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 11/30] PCI: tegra: Increase the deskew retry time Manikanta Maddireddy
2019-04-15 11:39   ` Thierry Reding
2019-04-15 14:58     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 12/30] PCI: tegra: Add SW fixup for RAW violations Manikanta Maddireddy
2019-04-11 20:01   ` Bjorn Helgaas
2019-04-12  5:59     ` Manikanta Maddireddy
2019-04-15 11:41       ` Thierry Reding
2019-04-15 11:45   ` Thierry Reding
2019-04-15 15:02     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 13/30] PCI: tegra: Update flow control threshold in Tegra210 Manikanta Maddireddy
2019-04-15 11:47   ` Thierry Reding
2019-04-15 15:05     ` Manikanta Maddireddy
2019-04-23  9:27       ` Manikanta Maddireddy [this message]
2019-04-11 17:03 ` [PATCH 14/30] PCI: tegra: Set target speed as Gen1 before link up Manikanta Maddireddy
2019-04-11 20:04   ` Bjorn Helgaas
2019-04-12  6:44     ` Manikanta Maddireddy
2019-04-12 14:35       ` Bjorn Helgaas
2019-04-15 10:43         ` Manikanta Maddireddy
2019-04-15 11:52   ` Thierry Reding
2019-04-15 15:12     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 15/30] PCI: tegra: Fix PLLE powerdown issue due to CLKREQ# signal Manikanta Maddireddy
2019-04-15 13:17   ` Thierry Reding
2019-04-15 15:14     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 16/30] PCI: tegra: Program AFI_CACHE* registers only for Tegra20 Manikanta Maddireddy
2019-04-15 13:20   ` Thierry Reding
2019-04-16 10:47     ` Manikanta Maddireddy
2019-04-16 16:11       ` Thierry Reding
2019-04-11 17:03 ` [PATCH 17/30] PCI: tegra: Use switch statements in tegra_pcie_isr() Manikanta Maddireddy
2019-04-15 13:25   ` Thierry Reding
2019-04-15 15:25     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 18/30] PCI: tegra: Change PRSNT_SENSE irq log to debug Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 19/30] PCI: tegra: Use legacy irq for port service drivers Manikanta Maddireddy
2019-04-15 13:35   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 20/30] PCI: tegra: Add AFI_PEX2_CTRL reg offset as part of soc struct Manikanta Maddireddy
2019-04-15 13:31   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 21/30] PCI: tegra: Add "pci" type check before parsing child device tree node Manikanta Maddireddy
2019-04-15 13:37   ` Thierry Reding
2019-04-15 15:30     ` Manikanta Maddireddy
2019-04-15 15:42       ` Thierry Reding
2019-04-11 17:03 ` [PATCH 22/30] PCI: tegra: Access endpoint config only if PCIe link is up Manikanta Maddireddy
2019-04-11 20:15   ` Bjorn Helgaas
2019-04-12  7:00     ` Manikanta Maddireddy
2019-04-12 14:50       ` Bjorn Helgaas
2019-04-15 11:36         ` Manikanta Maddireddy
2019-04-15 13:45           ` Thierry Reding
2019-04-15 13:52             ` Thierry Reding
2019-04-15 14:04           ` Bjorn Helgaas
2019-04-15 15:43             ` Manikanta Maddireddy
2019-04-23 20:24               ` Bjorn Helgaas
2019-04-11 17:03 ` [PATCH 23/30] dt-bindings: pci: tegra: Document PCIe DPD pinctrl optional prop Manikanta Maddireddy
2019-04-15 14:07   ` Thierry Reding
2019-04-15 15:48     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 24/30] arm64: tegra: Add PEX DPD states as pinctrl properties Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 25/30] PCI: tegra: Put PEX CLK & BIAS pads in DPD mode Manikanta Maddireddy
2019-04-15 14:11   ` Thierry Reding
2019-04-11 17:03 ` [PATCH 26/30] dt-bindings: pci: tegra: Document nvidia,plat-gpios optional prop Manikanta Maddireddy
2019-04-11 20:18   ` Bjorn Helgaas
2019-04-12  7:01     ` Manikanta Maddireddy
2019-04-15 14:16   ` Thierry Reding
2019-04-15 17:58     ` Manikanta Maddireddy
2019-04-16 15:34       ` Thierry Reding
2019-04-17 11:22         ` Manikanta Maddireddy
2019-04-17 15:19           ` Thierry Reding
2019-04-17 18:26             ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 27/30] PCI: tegra: Add support to configure platform GPIOs Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 28/30] dt-bindings: pci: tegra: Document nvidia,rst-gpio optional prop Manikanta Maddireddy
2019-04-15 14:20   ` Thierry Reding
2019-04-15 18:01     ` Manikanta Maddireddy
2019-04-29 18:33     ` Rob Herring
2019-04-11 17:03 ` [PATCH 29/30] PCI: tegra: Add support for GPIO based PCIe reset Manikanta Maddireddy
2019-04-15 14:20   ` Thierry Reding
2019-04-15 18:03     ` Manikanta Maddireddy
2019-04-11 17:03 ` [PATCH 30/30] PCI: tegra: Change link retry log level to INFO Manikanta Maddireddy
2019-04-15 14:23   ` Thierry Reding
2019-04-15 18:05     ` Manikanta Maddireddy

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